When did Weining Su Qiao become the intangible cultural heritage of Guizhou?

20 12. traditional production techniques of buckwheat crisp (Weining): 20 12 was selected as the third batch of provincial intangible cultural heritage, buckwheat crisp, also known as golden crisp. Golden yellow, soft and sweet, nutritious, delicious and cheap. It is a specialty of Weining Yi, Hui and Miao Autonomous County in Guizhou Province and enjoys a high reputation both inside and outside Guizhou Province.